Lex Luthor, Jr.
Debut Action Comics #544 (June 1983)
Created by Cary Bates and Curt Swan
Portrayed by see In other media
Relatives Lex Luthor (father), Ardora (mother)

Lex Luthor, Jr. is the son of Lex Luthor, who lived on the planet Lexor in the pre-Crisis universe. Lex senior had become the planet's champion and took a wife, Ardora, whom he visited sporadically when not on Earth.

Upon his last visit to the planet, Ardora surprised her husband with the reveal of a son they had produced. Over the following weeks, during which Lex senior had committed himself to a reformed life on Lexor, his son was a source of great joy.

Superman eventually caught up with Lex senior who had happened upon a hidden source of advanced technology left behind one of Lexor's extinct civilizations. Lex built an armored suit from the wreckage, strong enough to battle a Superman weakened by the planet's red sun.

During the battle, Lex's offensive interacted with the neutrarod he had built to stabilize the planet's core. The result was a chain reaction that instantly destroyed the planet, including his wife and son.

In other media